redirect.php

<?php

/**
 * @param string
 * @param string
 * @param Mage_Core_Model_Store
 * @throws Exception
 */
function createRedirect($fromUrl, $toUrl, Mage_Core_Model_Store $store)
{
    /** @var Enterprise_UrlRewrite_Model_Redirect $redirect */
    $redirect = Mage::getModel('enterprise_urlrewrite/redirect');
    $redirect->loadByRequestPath($fromUrl, $store->getId());
    $redirect->setStoreId($store->getId());
    $redirect->setOptions('RP');//RP=301, R=302
    $redirect->setIdentifier($fromUrl);
    $redirect->setTargetPath($toUrl);
    $redirect->setEntityType(Mage_Core_Model_Url_Rewrite::TYPE_CUSTOM);
    $redirect->save();
}

$redirects = [
  // "from" => "to",
];

include '../app/Mage.php';
$store = Mage::app()->getStore(1);
foreach ($redirects as $fromUrl => $toUrl) createRedirect($fromUrl, $toUrl, $store);